Home / 10,965.91-15,131.78-6,489.85

Finding the Fourth Proportional to 10,965.91, 15,131.78 and 6,489.85

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Solution

The fourth proportional to 10,965.91, 15,131.78 and 6,489.85 is: 8,955.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,965.91 : 15,131.78 = 6,489.85 : x
  2. Step 2: Convert to fraction form
    10,965.91/15,131.78 = 6,489.85/x
  3. Step 3: Cross multiply
    10,965.91x = 15,131.78 × 6,489.85
  4. Step 4: Simplify right side
    10,965.91x = 98,202,949.98
  5. Step 5: Solve for x
    x = 98,202,949.98/10,965.91
  6. Step 6: Final answer
    x = 8,955.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.